AMKOR TECHNOLOGY, INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| KIM JAMES J | — | Gift | 725,000 | — | — | 725,000 | Dec 26, 2025 |
| 2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 | — | Gift | 725,000 | — | — | — | Dec 26, 2025 |
| KIM JOHN T | — | Gift | 725,000 | — | — | 9,846,944 | Dec 26, 2025 |
| KIM SUSAN Y | — | Gift | 725,000 | — | — | 1,124,000 | Dec 26, 2025 |
| KIM AGNES C | — | Gift | 725,000 | — | — | 10,737,355 | Dec 26, 2025 |
| KIM SUSAN Y | — | Gift | 2,538,000 | — | — | 2,538,000 | Dec 19, 2025 |
| KIM JAMES J | — | Gift | 3,244,594 | — | — | 61,645 | Dec 19, 2025 |
| KIM AGNES C | — | Gift | 3,244,594 | — | — | 10,012,355 | Dec 19, 2025 |
| ROGERS MARK N | EVP & General Counsel | Sale | 20,000 | $42.95 | $859,000 | 23,862 | Dec 16, 2025 |
| CHURCHILL WINSTON J | — | Option Exercise | 5,000 | $19.39 | $96,950 | 30,888 | Dec 15, 2025 |
| Rutten Guillaume Marie Jean | President and CEO | Sale | 10,000 | $44.80 | $448,000 | 336,699 | Dec 15, 2025 |
| McCourt MaryFrances | — | Option Exercise | 20,000 | $19.39 | $387,800 | 75,918 | Dec 12, 2025 |
| Engel Kevin | Executive Vice President | Sale | 11,000 | $46.21 | $508,310 | 349 | Dec 12, 2025 |
| Tily Gil C. | — | Sale | 20,000 | $46.44 | $928,800 | 123,806 | Dec 12, 2025 |
| KIM SUSAN Y | — | Gift | 758,000 | — | — | 1,849,000 | Dec 4, 2025 |
| 2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 | — | Gift | 758,000 | — | — | 725,000 | Dec 4, 2025 |
| KIM JAMES J | — | Gift | 965,000 | — | — | 965,000 | Nov 21, 2025 |
| KIM SUSAN Y | — | Gift | 876,000 | — | — | 2,607,000 | Nov 20, 2025 |
| 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024 | — | Gift | 876,000 | — | — | 1,124,000 | Nov 20, 2025 |
| KIM AGNES C | — | Gift | 705,000 | — | — | 705,000 | Nov 20, 2025 |
| 2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 | — | Gift | 705,000 | — | — | 895,000 | Nov 20, 2025 |
| 2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024 | — | Gift | 965,000 | — | — | 1,235,000 | Nov 20, 2025 |
| Rutten Guillaume Marie Jean | President and CEO | Sale | 10,000 | $31.68 | $316,800 | 346,699 | Nov 17, 2025 |
| ROGERS MARK N | EVP & General Counsel | Sale | 20,000 | $31.69 | $633,800 | 23,862 | Nov 17, 2025 |
| Haghighi Farshad | Executive Vice President | Option Exercise | 67 | — | — | 8,421 | Nov 14, 2025 |
| Engel Kevin | Executive Vice President | Option Exercise | 47 | — | — | 11,368 | Nov 14, 2025 |
| KIM JOHN T | — | Gift | 40,750 | — | — | 5,594,489 | Nov 4, 2025 |
| John T. Kim 2024 GRAT #2 dtd. 08/09/2024 | — | Gift | 40,750 | — | — | 59,250 | Nov 4, 2025 |
| John T. Kim 2024 GRAT #1 dtd. 08/09/2024 | — | Gift | 806,000 | — | — | 1,194,000 | Nov 4, 2025 |
| Rutten Guillaume Marie Jean | President and CEO | Sale | 10,000 | $30.74 | $307,400 | 356,699 | Oct 15, 2025 |
| Engel Kevin | Executive Vice President | Option Exercise | 8,692 | — | — | 15,046 | Sep 30, 2025 |
| Faust Megan | CFO | Option Exercise | 8,692 | — | — | 95,796 | Sep 30, 2025 |
| Rutten Guillaume Marie Jean | President and CEO | Option Exercise | 8,692 | — | — | 366,699 | Sep 30, 2025 |
| Rutten Guillaume Marie Jean | President and CEO | Sale | 10,000 | $30.00 | $300,000 | 358,007 | Sep 23, 2025 |
| Haghighi Farshad | Executive Vice President | Sale | 11,792 | $25.00 | $294,800 | 8,354 | Sep 9, 2025 |
| KIM JAMES J | — | Sale | 441,589 | $21.85 | $9,648,720 | 2,341,239 | Aug 1, 2025 |
| KIM AGNES C | — | Sale | 441,589 | $21.85 | $9,648,720 | 12,290,281 | Aug 1, 2025 |
| 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 | — | Gift | 280,000 | — | — | 280,001 | Aug 1, 2025 |
| KIM DAVID D | — | Purchase | 441,589 | $21.85 | $9,648,720 | 3,789,479 | Aug 1, 2025 |
| SUJODA Investments, LP | — | Purchase | 441,589 | $21.85 | $9,648,720 | 3,789,479 | Aug 1, 2025 |
| Sujoda Management, LLC | — | Purchase | 441,589 | $21.85 | $9,648,720 | 3,789,479 | Aug 1, 2025 |
| 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 | — | Gift | 438,002 | — | — | — | Aug 1, 2025 |
| KIM JOHN T | — | Purchase | 441,589 | $21.85 | $9,648,720 | 3,789,479 | Aug 1, 2025 |
| KIM SUSAN Y | — | Gift | 280,000 | — | — | 280,001 | Aug 1, 2025 |
| ROGERS MARK N | EVP & General Counsel | Sale | 15,000 | $23.58 | $353,700 | 23,862 | Jul 31, 2025 |
| KIM JAMES J | — | Gift | 2,711,000 | — | — | 2,782,828 | Jul 30, 2025 |
| KIM SUSAN Y | — | Gift | 1,738,000 | — | — | 560,001 | Jul 30, 2025 |
| 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 | — | Gift | 1,738,000 | — | — | 560,001 | Jul 30, 2025 |
| 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 | — | Gift | 2,711,000 | — | — | 876,004 | Jul 30, 2025 |
| KIM AGNES C | — | Gift | 2,711,000 | — | — | 12,731,870 | Jul 30, 2025 |